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Davepee
Questions and answers by
Davepee
Questions (61)
A sample consists of 2.00 mole He is expanded isothermally at 22 degree celsius from 22.8 dm³ to 31.7 dm³(a) reversibly, (b)
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As a high-speed spaceship flies passt you, it fires strobe light that sends out a pulse of light in all directions. An observer
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How can we prepare soluble solid magnesium sulphate from other solutions?
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Write equation to show how acetic anhydride may be used to prepare methyl acetate.
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Write equation to show how acetic anhydride may be used to prepare isopropyl acetate.
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Write equation to show how acetic anhydride may be used to prepare tert-butyl acetate.
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Write equation to show how acetic anhydride may be used to prepare phenyl acetate.
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What is the colour charge occur when salicylic acid dissolved in ethanol?
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What colour charge occurs when aspirin dissolved in ethanol?
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What is the colour of the ethanol only in the test tube?
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What is the chemical formula for salicylic acid and its molar mass?
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Aspirin did/did not contain salicylic acid as impurity?
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What is the Thermal conductivity of a wood?
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What are Carboxylic Acids? (Full Descriptions)
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Briefly describe, what is Acetic Acid and its chemica formula?
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Briefly describe the structure of the Acetic Acid with ball and stick structure.
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State some of the physical properties of acetic acid.
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What are some of the physical properties of acetic acid?
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What are some of the chemical properties of acetic acid?
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State, what are some uses and applications of acetic acid?
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What are some of the References regarding acetic acid?
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18 views
The scale on a map is 1:20000. What actual distance does a length of 8cm on the map represent?
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A football match is watched by 56742 people. Write this number correct to the nearest;
A) 10 000 B) 1000 C) 10
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How many significant figures in each of the following?
A) 3.405 B) 0.00289 C) 1030
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Round each of the following numbers to 3 significant figures:
A) 342.79513 B) 9,845.8749 C) 0.000045389
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Write 3871 to 2 significant figures.
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Raising a negative number to a power:
A) (-5)³ B) (-4)² C) (-1)⁵ D) 2³ - 3²
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11 views
Describe the chemical structure of acetic acid.
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A sample consisting of 2.00 mole of perfect gas molecules, for which Cv,m = R, initially at P1=111 kPa and T1= 277 K, is heated
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The constant-pressure heat capacity of a sample of a perfect gas was found to vary with temperature according to the expression
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Briefly explore the differences between the methanoic acid and acetic acid interms of physical and chemical properties.
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Briefly explain the difference between acetic acid and propanoic acid in terms of polarity.
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Briefly explain the difference between acetic acid and propanoic acid in terms of their physical and chemical properties.
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A chemical reaction takes place in a container of cross-sectional area 50.0 cm². As a result of the reaction, a piston was
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A sample consists of 2.0 mole He was expanded isothermally at 22 degree celsius from 22.8 dm³ (a) reversibly, (b) against a
1 answer
11 views
Calculate delta rH° and delta rU° at at 298K and delta rH° at 348K for the hydrogenation of ethyne to ethene from the
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Calculate the molar entropy of a constant-volume sample of argon at 250K given that it is 154.84J/K/mol at 298K.
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A certain heat engine operates between 1000K and 500K (a) what is the maximum efficiency of the engine? (b) calculate the
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9 views
Calculate the standard Gibbs energy of the reaction CO (g) + CH3OH (l) ----> CH3COOH (l) at 298K, from the standard entropies
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Calculate the molar entropy of a constant-volume sample of argon at 250K given that it is 154.84 J/K/mol at 298K.
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9 views
Suggest a physical interperation of the dependence of the Gibbs energy on the temperature.
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Using the benzaldehyde and ylide, show the reaction that produces phosphorus ylide using the correct alkyl halide. Include the
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Show the reaction between the benzaldehyde and ylide and show the mechanism of the reaction.
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A phosphorus ylide is a Wittig reagent and is prepared using an alkyl halide and triphenyl phosphide. Using an appropriate
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13 views
Baeyer- Villiger reaction is an oxidation reaction of aldehydes and ketones. State two differences of Baeyer- Villiger reaction
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Explain migratory aptitude that has to be considered in a Baeyer-Villiger reaction.
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Show the reaction mechanism of the reaction below and name the products formed.
Ethyl methyl ketone + peroxyacetic acid-----> ??
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9 views
Explain why a tertiary alkyl halide cannot be used to prepare an phosphorus ylide. Show the reaction mechanisms.
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6 views
Show the reaction that produces phosphorus ylide using the correct alkyl halide.
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Show the reaction between the aldehyde and the ylide and show the mechanism of the reaction.
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6 views
If the sun somehow collapsed to form a black hole, what effect would this event have on the orbit on the earth? (i) the orbit
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11 views
How could you prepare pentanal from pentanoic acid?
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What are some of the reagents involved in the preparation of pentanal from Valeric acid?
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Explain, why are Tin compounds are covalent in Nature?
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Explain the Zone Refining Process.
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How did Fullerene obtain its name as Bulkminsfulleren?
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7 views
Describe the structure of diamond and graphite.
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12 views
What are photosensitizers? Explain in terms of inorganic chemistry.
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Referring to the polymorphic structure of silica, describe the pulverization process involved in the extraction of Tin.
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Explain, what are Antiknoc?
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What is ment by "leaded petrol"?
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11 views
